Safety means for power-presses.



B. c. AMES. SAFETY MEANS FOR POWER PRESSES.

APPLICATION FILED JAN. 14, 1916.

1,21 6,6475. Patented Feb'. 20, 1917.

Afm/ay.

B. C. AMES. SAFETYIVIEANS FOR POWER PRESSES.

APPLICATION FILED IAN. I4, I9I6.

Patented Feb. 20,1917.

2 SHEETS-SHEET 2.

llllllllllllll I IIIIIIII WWW e A m S mw m .nw e @eww we W. New Q@ QQ I@y e I. H. M I T- Q m\\, Q mw uw; w E H M e W e VIII UNITED sTATEsPATENT oEEicE;

BURTON o. AMES', OF TOLEDO, OHIO;

SAFETY MEANS EoE-,rowEE-PEESSES.

To all whom t may concern.'

Be it known that I, BURTON C. AMEs,a citizen of the United States, and aresident of Toledo, in the county of Lucas and State of Ohio, haveinvented a certain new and useful Safety Means for Power-Presses; and Ido hereby declare the following to be a full, clear, andexact-description of the invention, such as will enable others skilledVin the art to which it appertains to make and use the same, Vreferencebeing had to the accompanying drawings, and to the characters. ofreference marked thereon, which form a part of this specification.

This invention relates to 'safetyV devices for use on power presses orthe like, and has for its object the .provision of simple and improvedmeans for effecting av positive stopping of the Operatinparts-after cachcycle of operations, there y preventing liability of injury to theoperator or attendant by' reason of a premature orunexpected lowering ofthe punch or die carrying slide.

The invention is fully described inthe following specification, andwhile, in its broader aspect, it is capable of embodimentI preferredembodiment in numerous forms, a thereof is illustrated drawings, inwhich,- Y

Figures 1 and 2 are front and side elevations of a power press embodyingthe invention. Fig. 3 is an enlarged front elevation of the mechanismembodying the invention with the associated clutch in releasedposition.Fig. 4 is a section'on the line 4 4 in in vthe accompanying Fig. 3, andFig. 5 is a section Yof the lclutch parts taken longitudinally of theiraxis.

Referring to the drawings, l designates the frame of a power press, 2the customaryk crank or cam shaft, and 3 the upper die carrying slidethat is supported by the yshaft 2 and connected to the crankor camportion thereof, whereby a Arotation of the shaft imparts verticalreciprocatory movements to the slide. The shaft 2 is provided at one endY.thereof with afriction brake member 4 that is anchored to theA pressframe and serves to resist a turning of the shaft, as is Y wellunderstood in theart. A power member' 5 is loosely mounted on one end ofthe shaft 2, said member, in the' present instance, comprising a gear,and feathered to` the shaft2 between themember 5 and press Vframe is ashiftableclutch collar 6 that is movable axially of theshaft into andoutl of l clutch engagement with .presses and need l:not

.Specification of Letters Patent. Patented Feb, 20, 1917. Applicationmed January 14, i916. serialNo. 72,075. Y

thehub portion of the rpower member 5. y y

Disposed above thevclutch member 6 is a frame vbracket 7, havingvertically spaced arms .for guiding the reciprocatory movements of alrod or stem 8, which carries a at its lower end, said roller `havingits axisdl'sposed longitudinally of the rod. The

roller lO normally rests in a peripheral Vweight 9 at its upper lend anda roller l0`` tion. Upon a raising of the roller 10 froml l within thegroove 11, the clutch member 6 is automatically moved into clutchengagement with its companion, by springs 12 or in any other suitablemanner, as is well understood inthe art.v Upon a release or lowering ofthe roller 10 after being raised 'from within the groove 11, itstandsinthe path of movement of a cam surface or shoulder 13 at the rear orinner edge of the groovell, andV when the clutch member 6 .and partsattached thereto have approximately completed a revolution, the camshoulder 13 coacts with the roller 10 to retract the'clutch member from`engagement with the power memberr5 and to place the groove 11 intovertical register withl the roller, as shown inFig. 3. When the'clutchmemberv 6 has been moved from engagementA with the drive' member 5, theshaft 2 and parts carried thereby are brought to a stop rby thefrictional braking action of the brakev means 4 on theshaft.` It hasbeen common to depend on this brake means to prevent aturning of thecrank shaft and consequent` lowering of the die carrying slide 3underthe excessive weight of the latter, and it is to overcome suchliability of the4 shaft turning undery the weight of the slide 3 andparts carried thereby that the present invention is provided. Theraising movements of the rod' ory stem8 with .respect tothe clutchmember 6 are controlled by a lever 14, which is fulcrumed toa part ofthe bracket 7 and has one end in forked engagement with said rod anditsfothe'r endl connected by a pair of linkmembersV 15and 16 with a foottreadle 17 or other suitable control part. The constructionaboved'escribed is lcommonv to power` therefore be e described tion willnow be described. Vi.#ne'cufredito Y Yoriopeningfin which a Y forvertical@reciprocatory movements.VVV

`:p1n'19fis carriedV atii'tsflower'Y end by the Vfree end l*of aV levermember"to which it Y side oftheframe'libelowthe clutch member -Y oted atits oppositeend, asiat 21,tooneV end of the bracket 18. "is

QA rod orstem22 is piv-V Voted to Vand Vprojectsrupward from the lever,

' *Y member 20 intermediate itsends and through a; guidefboss 23 onthe'bracket 18;: AV coiled a lowering ofthe lever 20 against the ten-f V Ye' sion of the spring 2/lfand a consequent withf drawing of thelock-pinV19 from within the notch 27 yof thev clutch member compressionspring'24`is disposed onrthe'rod;

22 aboverthe guide-boss 231andhasits lower end `thrust against( saidVboss, and itsupper end thrust against anut 25 that is'threaded on theupper endA of the rod22, It is thus Y evident that the lever 20 andVlock-pin 19 are normallyrvheld inraised'position byfthe action. of therod'221and spring 24 in cony necrtion with theboss 23.V

Theclutch member 6 's n provided Y at its Vinner end with acircumferential flange or shoulder26 having a notch 27 ,Y which regis(-ters withfthestop-pin 19 and receives said pin whentherclutch. member6-and shaft2 Vare at rest position, wlth the Vdie carrying slide 3V atthe upper end ofrits stroke. 'Y Y control' link dinallyHe/Xtending slot28 through-which a Y The' 15 is provided with a longitupin l29 on thelever 20loosely projects.Y

' When thegcontrolparts are in theirtnormal position, the upper end ofthe'slot 2S is*VVV V'substantially in contact -with the upperside VofVthespin 29 so that la downwardY clutch releasing movement Vof thelinlr15 will eect 6, thus per# when' saidmember isV near Vthevcompletion ofia revolution' or cycle of movement there'- A 3;of,fthejpin 19i rests-.against the flangeY 26 ,Mld Y does not-return toitsnormalposition; until 1:k the .noth127 has tui-nedj'into registerthere:

with. Y It isi therefore thev purpose-of .'sition bv reasonV of the,`stop-pin bearing' against,vtheflange'27. -V Y* Y InY the use of amachine"embodyingV my' inventionitis 'evidentfthat a downward;`

thelslot Y28 inther-link'- 15 to permit. said linkftoYY return to its'normalrraised positionlrwhenftheff engagement Qwithfsaid pa-featheredon Vsaid lshaf for movements into lever .20 lis stillretainedinits lowered vpomovementof ,they h Y Y l Y *Y fect Yanoperation 6 is a bracket 18, the outer end portion ofi which isvtransversely` broadened Y with re-f spect to the'fra'me and `providedimmediatelyYY Y below the rear orV inner edge clutchmemb'er' 6'with averticalfguide-.way

locks-'pin 19 ismou'nted 'Ther portion of "the f y 'member VVfromengagement with V member 5. jWli'enfthe'cln/tch member 6 has f been{m'ovedrgto released jpo'sition, the turnstopped by A brake ymeanscontrol linksV 15, V16 to efofthe'press will cause a simultaneousraising of theroller V1'O to perthe clutchmember 6 with mit :anYengaging or A the vV-drlveimember 5, and afloweringrof the'stopjpinf1'9fromwithin the notch27l of the clutch-.memberi' 6 toypermit turning of Y`the:'clutchjV member with ,i the drive Imember.

rWhen 4the VVoperating parts have Vbegun4 a cycler of movements theVoperatonreleases the downward pressure on thelinks 15,16, thuspermittinglthe roller 10,V to lower' intoposi-V tionto coactwith 'thecamshoulder 13 on the clutchmember and effectra'release of such theYdrive ing move ynent vof' the crankfshaft 2 will be :the'gfriotionalcoaction of the 47:7- therewith, said brakeA means, when in proper.workingvconditiomaresisting a turning of he'sha'ftdueto :the weight ofthe'diecarrying slide S'Tthereonandwill hold the parts in normalY*inoperative position. When the clutch member has-:been given acompleteV turnthe stop-'pin 19 moves' into the registering notch127lofthe clutch member and Vstops Y a Vfurther rotationl thereof should thebralremeans ,by reason of wearer some defectbe unabl'eeto Vstop theturning of the crankshaft at th'evend-V ofja Y:complete rotationthereof.

lt:v is-thus evident .ihave l.provided a simp'lefandY efficient safetydevice, which is releasedrfrom engagement with the clutch member bythereleasing movements of `the Y clutch control-rneans,V and yautomaticallyVacts lonlgtherclutch, VorV some-I part which is fixed toY Y thel shaftfor'turning thelwitlnto stop its turningmovementat Vthe lend of eachcomplete rotation;thereof.V A I I wish. it .understood that `myinvention is notlimitedf to any.,specificv construction, arrangement or1form ofthepartsor ,to the use ofthe same in connection with Y any, particu- 1 larformzor constructionof cllrtchV and clutch control rmeans,as s numerous `modilioations can lmadelewithoutdeparting' from thcspirit of the claims. Havingfthus described my Vin w'fention, what tersl )atent,'*isf-v` e n i Y* lQlnicombination, aashaft drive means forsaid shaft normally?i disengagedY therefromga part:mountedV on 4andret'atablewith ulderj of said ta fn'ithefpinlin stop ,apclutchmember YSanering-in' pagina and out of engagementjwith'j said drive Vmeans,gmeans for lcontrollingfthej clutch engagles :and

.releasingf.finovements of said I claim Yas new', and desl'refto securebyV Let-V Y iso clutch member, and connection between said control meansand lever operable to effect a release of said pin from stop engagementwith said part when the control means is moved to release the clutchmember.

2. In combination, a shaft, drive means for said shiaft and normallydisengaged therefrom, a clutch collar feathered to said shaft andnormally operable to engage said drive means, clutch collar engagingmeans operable to release the clutch collar to per mit its engagementwith said drive means and to impart a releasing movement to said collarat a predetermined point ina rotation thereof, control means for saidclutchv engaging means, a lever having pin and slot connection wlth saidcontrol means whereby a releaslng movement of sald control means willmove the lever from normal position and permit it to remain out ofnormal position when the control means is returned to its normalposition, means normally retaining said lever in one position of itsmovement, and means carried by said lever and operable to engage a partof said clutch collarvand stop the rotation thereof when at apredetermined point in its rotation;

In testimony whereof, I have hereunto signed my name to thisspecification.

BURTON C. AMES.

Copies of this patent may be obtained for five` cents each, ybyaddressing the Commissioner of Patents,

Washington, D. C.

